body{
	padding-top: 50px;
	padding-left: 240px;
	background: lightblue;
}
li{
	list-style-type: none;
}
.Arthur_header{
	height: 50px;
	width: 100%;
	position: fixed;
	top: 0;
	left: 0;
	background:white;
	z-index: 5;
}
.Arthur_aside{
	height: 100%;
	width: 240px;
	position: fixed;
	top: 0;
	left: 0;
	background: gray;
	z-index: 4;
	padding-top: 50px;
}
.Arthur_nav{
	padding-left: 0;
}
.Arthrr_nav > li{
	padding: 0 8px;
	border-bottom: 1px solid #DDD;
	font-size: 16px;
}
.Arthur_nav_in{
	background: black;
	color: white;
	display: none;
}
.Arthur_nav > li:hover
